Musical instrument double plectrum



FIG. 1 is a right side elevational view, the left side elevational view being identical, of a musical instrument double plectrum showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a musical instrument double plectrum, as shown and described. 